Welcome to the world of Android. Now forget everything you thought you knew about cell phones because Android is a whole other beast! Every app you had on your blackberry will most likely be on Android. I'm relatively new to android as well so I'm still a newbie; however, I can list a few apps I really enjoy so far.
Launcher pro plus... if you get the paid for app ($2.99) then you can customize your UI with things that make me wonder why android hasn't made it default.
Fancy widget... much nicer looking clock/weather app than HTC imo. I use the free version because it let's me do everything I wanted to, not sure what's unlocked in the paid for version though.
Tapatalk... great app for forums. It's what I'm using to post this message. I'm hoping that eventually all my fav forums will use it.
Gameboid/snesoid/psx4droid... let's you play any gameboy, snes, and playstation 1 game on your phone. You can download all sorts of roms for just about every game released for them.
I'll think of more. If you have any questions or want to know more about any of those apps you can pm me and I will be glad to explain further.
Sent from my Droid Incredible using Tapatalk.